Mihaly Csikszentmihalyi

A psychologist who studies what he refers to as 'optimal experience' or flow. In addition to a number of scientific studies, he has authored the book Flow: the Psychology of Optimal Experience. His last name is pronounced, I believe, something like 'chick-sent-me-hall-yee'. (Unfortunately, I can't provide an IPA transcription for you in this format.) According to a prof of mine who knew him in her graduate work, everyone calls him Mike.